Base Station Device, Mobile Station Device, Program, Uplink Synchronization Requesting Method, and Synchronization-Shift Measurement Signal Transmitting Method

1. A mobile station device included in a mobile communication system, the mobile station device comprising: a receiver configured to receive, on a physical downlink control channel (PDCCH) from a base station device, control information including a sub-region for radio resource assignment information; a detector configured to detect, based on a predetermined first region in the control information, an indication to order a random access and to detect, based on a second region in the control information, that does not overlap with the first region, an identification number specifying a random access preamble and information specifying a region on a radio frame available for the random access; and a transmitter configured to transmit, to the base station device, the random access preamble specified by the identification number in the region specified by the information detected, in a case that the indication to order a random access is detected, wherein the first region includes the sub-region.

2. A base station device included in a mobile communication system, the base station device comprising: a transmitter configured to transmit, on a physical downlink control channel (PDCCH) to a mobile station device, control information including a sub-region for radio resource assignment information; and a detector configured to detect a random access preamble, the random access preamble being transmitted from the mobile station device, wherein, in a case that a random access is ordered to the mobile station device, an indication to order the random access is included in a predetermined first region in the control information, and an identification number specifying the random access preamble and information specifying a region on a radio frame available for the random access are included in a second region in the control information, that does not overlap with the first region, and the first region includes the sub-region.

3. A processing method for a mobile station device included in a mobile communication system, the method comprising: receiving, on a physical downlink control channel (PDCCH) from a base station device, control information including a sub-region for radio resource assignment information; detecting, based on a predetermined first region in the control information, an indication to order a random access and detecting, based on a second region in the control information, that does not overlap with the first region, an identification number specifying a random access preamble and information specifying a region on a radio frame available for the random access; and transmitting, to the base station device, the random access preamble specified by the identification number in the region specified by the information detected, in a case that the indication to order the random access is detected, wherein the first region includes the sub-region.

4. A processing method for a base station device included in a mobile communication system, the method comprising: transmitting, on a physical downlink control channel (PDCCH) to a mobile station device, control information including a sub-region for radio resource assignment information; and detecting a random access preamble, the random access preamble being transmitted from the mobile station device, wherein in a case that a random access is ordered to the mobile station device, an indication to order the random access is included in a predetermined first region in the control information, and an identification number specifying the random access preamble and information specifying a region on a radio frame available for the random access are included in a second region in the control information, that does not overlap with the first region, and the first region includes the sub-region.

5. A mobile station device included in a mobile communication system, the mobile station device comprising: a receiver configured to receive, on a physical downlink control channel (PDCCH) from a base station device, control information including a sub-region for radio resource assignment information; a detector configured to detect, based on a predetermined first region in the control information, an indication to order a random access and to detect, based on a second region, in the control information, that does not overlap with the first region, an identification number specifying a random access preamble and information specifying a region on a radio frame available for the random access; and a transmitter configured to transmit, to the base station device, the random access preamble specified by the identification number in the region specified by the information detected, in a case that the indication to order a random access is detected, wherein the first region includes the sub-region.

6. A base station device included in a mobile communication system, the base station device comprising: a transmitter configured to transmit, on a physical downlink control channel (PDCCH) to a mobile station device, control information including a sub-region for radio resource assignment information; and a detector configured to detect a random access preamble, the random access preamble being transmitted from the mobile station device, wherein in a case that a random access is ordered to the mobile station device, an indication to order the random access is included in a predetermined first region in the control information, and an identification number specifying the random access preamble and information specifying a region on a radio frame available for the random access are included in a second region, in the control information, that does not overlap with the first region, and the first region includes the sub-region.

7. A processing method for a mobile station device included in a mobile communication system, the method comprising: receiving, on a physical downlink control channel (PDCCH) from a base station device, control information including a sub-region for radio resource assignment information; detecting, based on a predetermined first region in the control information, an indication to order a random access and detecting, based on a second region, in the control information, that does not overlap with the first region, an identification number specifying a random access preamble and information specifying a region on a radio frame available for the random access; and transmitting, to the base station device, the random access preamble specified by the identification number in the region specified by the information detected, in a case that the indication to order the random access is detected, wherein the first region includes the sub-region.

8. A processing method for a base station device included in a mobile communication system, the method comprising: transmitting, on a physical downlink control channel (PDCCH) to a mobile station device, control information including a sub-region for radio resource assignment information; and detecting a random access preamble, the random access preamble being transmitted from the mobile station device, wherein in a case that a random access is ordered to the mobile station device, an indication to order the random access is included in a predetermined first region in the control information, and an identification number specifying the random access preamble and information specifying a region on a radio frame available for the random access are included in a second region, in the control information, that does not overlap with the first region, and the first region includes the sub-region.